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    <script>
        // 编写函数map(arr) 把数组中的每一位数字都增加30 %，并返回一个新数组
        var arr = [10, 100, 1000]
        var newArr = [];
        function map(st) {
            arr.forEach(v => { newArr.push(v * 1.3); });
            return newArr;
        }
        console.log(map(arr));
    </script>
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